I don't suppose you want my advice, which is to leave them in the bin or (even better) give them straight back to him 
Seriously, though, if you don't want to kill them keep them damp but don't drown them, and plant them in very strong pots as soon as possible. You should probably chop off a fair amount of the height and remove the older canes. They'll grown back far too quickly.
Don't, whatever you do, plant them in the ground.